#!/bin/sh

# parallel variant of nargs: execute command concurrently per stdin line.
# waits for the first process to finish every $core_count to limit load.

core_count=$(nproc)
counter=0

while read line
do
  "$@" "$line" &
  if test $core_count -eq $counter
  then
    wait $pid
    pid=$!
    counter=0
  else
    counter=$(($counter + 1))
  fi
done